Model Comparison
V4 Pro (Non-reasoning)
vs. GLM-5.1 (Reasoning)
Comparing 2 AI models · 7 benchmarks · DeepSeek, Z AI
Recommended Pick
Z GLM-5.1 (Reasoning) 12 metric wins Strongest on: Throughput, TTFT, Reasoning
Best Value
V4 Pro (Non-reasoning)
100.0 value score
39.6 reasoning / $0.54/1M
Lowest Price
V4 Pro (Non-reasoning)
$0.43/1M input price
Best Reasoning
GLM-5.1 (Reasoning)
55.4 reasoning score
Blends available reasoning benchmarks
Best for Coding
GLM-5.1 (Reasoning)
43.4 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
V4 Pro (Non-reasoning) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
V4 Pro (Non-reasoning) is 3.2x cheaper on input tokens than GLM-5.1 (Reasoning).
Speed gap
GLM-5.1 (Reasoning) generates about 1.4x as many tokens per second as V4 Pro (Non-reasoning).
Reasoning gap
GLM-5.1 (Reasoning) leads V4 Pro (Non-reasoning) by 15.8 points on reasoning.
Coding gap
GLM-5.1 (Reasoning) leads V4 Pro (Non-reasoning) by 5.0 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
V4 Pro (Non-reasoning)
DeepSeek
TTFT
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Time
—
tok/s
—
Tokens
—
Cost
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GLM-5.1 (Reasoning)
Z AI
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Full Comparison
| Metric | De V4 Pro (Non-reasoning) | Top Pick Z GLM-5.1 (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.43/1M | $1.40/1M |
| Output Cost | $0.87/1M | $4.40/1M |
| Blended (3:1) | $0.54/1M | $2.15/1M |
| Specifications | ||
| Organization | DeepSeek | Z AI |
| Release Date | Apr 24, 2026 | Apr 7, 2026 |
| Performance & Speed | ||
| Throughput | 49.3 tok/s | 71.4 tok/s |
| TTFT | 1193ms | 884ms |
| Latency | 1193ms | 53984ms |
| Composite Indices | ||
| Value Score | 100.0 | 35.4 |
| Reasoning Score | 39.6 | 55.4 |
| Intelligence | 39.3 | 51.4 |
| Coding | 38.4 | 43.4 |
| Standard Benchmarks | ||
| GPQA | 71.7% | 86.8% |
| HLE | 7.7% | 28.0% |
| SciCode | 42.4% | 43.8% |
| LCR | 45.0% | 62.3% |
| IFBench | 45.8% | 76.3% |
| TAU-bench v2 | 91.2% | 97.7% |
| TerminalBench Hard | 36.4% | 43.2% |
Key Takeaways
V4 Pro (Non-reasoning) offers the best value at $0.43/1M, making it ideal for high-volume applications and cost-conscious projects.
GLM-5.1 (Reasoning) has the strongest reasoning profile with a 55.4 reasoning score, combining the available reasoning-heavy benchmarks.
GLM-5.1 (Reasoning) reaches a 43.4 coding index, making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
V4 Pro (Non-reasoning)
- Cost-sensitive applications
- High-volume processing
GLM-5.1 (Reasoning)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
